Westphal
20D/Westphal
Where is it now
- Distance from Sun
- 21.109 AU
- True anomaly
- 195.6°
- As of
- 17 September 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
In the sky
- Right ascension
- 14h 19m 01s
- Declination
- -54° 19′ 03″
- Constellation
- Lupus
- Distance from Earth
- 21.52 AU
- Elongation from the Sun
- 64.57° — well clear of the Sun
Favours the southern hemisphere; low or below the horizon from far north.
From your location
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Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.
Orbital elements
- Semi-major axis
- 15.642 AU
- Eccentricity
- 0.9198
- Inclination
- 40.89°
- Orbital period
- 61.87 years
- Perihelion
- 1.254 AU
- Aphelion
- 30.03 AU
- Longitude of ascending node
- 348.01°
- Argument of periapsis
- 57.08°
- Epoch · J2000
- 2420080.5
- Orbit class · HTC
- Halley-type comet
- Earth MOID · 182.2 LD
- 0.4683 AU
- Tisserand (Jupiter)
- 1.361
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 201
- Data arc
- 61.11 years
- First observed
- 1 September 1852
- Last observed
- 13 October 1913
- Residual RMS
- 2.03 ″
- Solution · M.S.W. Keesey
- 11 April 2003
Visual & observation
- Absolute magnitude (H)
- 8.8
- Total magnitude M₁ · K₁ 10
- 8.8
Discovery & classification
Also known as 20D
Sources
- orbital elements: JPL SBDB